diff --git a/app/models/observer/ticket/notification.rb b/app/models/observer/ticket/notification.rb
index de50d994c..3f06a4b06 100644
--- a/app/models/observer/ticket/notification.rb
+++ b/app/models/observer/ticket/notification.rb
@@ -18,7 +18,7 @@ class Observer::Ticket::Notification < ActiveRecord::Observer
     EventBuffer.reset
 
     via_web = false
-    if ENV['SERVER_NAME']
+    if ENV['RACK_ENV'] || defined? Rails.configuration.webserver_is_active
       via_web = true
     end
 
diff --git a/config.ru b/config.ru
index de582f9b0..f742ce24f 100644
--- a/config.ru
+++ b/config.ru
@@ -1,4 +1,7 @@
 # This file is used by Rack-based servers to start the application.
 
+# set config to do no self notification
+Rails.configuration.webserver_is_active = true
+
 require ::File.expand_path('../config/environment',  __FILE__)
 run Zammad::Application